AirPlus Fashion 13000mAh Portable External Battery Power Bank Charger for iPhone/4/4s/5/5s/6/iPad/Samsung S3/S4/S5/MP3 (White) Mobile power has the conversion efficiency factor,so the mobile power station capacity will not the same as the charging capacity Charge/Discharge will have little heat phenomenon,it is normal phenomenon Please send the product in a cool and dry place,if the long-term when not in use,please ensure that 3 months for this product at least a full charge Connect this product and the charger with Micro 5 PIN USB line,then access mains socket(ac 220v),the bule charging indicator lighting shows that charger is in progress.When the charging is completed,the blue indicator will of and the red one will light. Shipping from LA, US